Unwanted occupation by anyone = terrorism.
Get on with the final stage of the peace process. Right now it is just a Kabuki dance of endless tit-for-tat death. Deciding who is, or who is not, in control of Palestine or whose turn it is to go lead has proved unfruitful.
Time to set the borders of both nations, require mutual recognition and a US/UN supervised non-aggression pact. Why delay?